EMPI's conversion drive flanges and stub axles are necessary items to upgrade your suspension to larger C.V. Joints. All EMPI drive flanges are forged from chromoly high strength steel that is then precision machined and heat treated to handle years of off-road abuse. Some flanges feature C.V. bolt holes that are made with 3/8" - 24 threads to accommodate heavy duty bolts. Use these flanges in conjunction with EMPI stub axles, heavy duty cages, races, boots and boot flanges to upgrade an existing suspension to a long travel, high performance suspension!